Pro Wired Programmable Room Thermostat. Made and supported by Honeywell (Resideo) with dedicated technical support number.
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Has been used however in very good condition
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The ST9400C complies fully with Building Regulations Part L1 for England & Wales and Part J for Scotland. This model has superceded the ST6400C. Part No: - ST9400C. All ST9400 models incorporate the Line of Text (LoT) display that gives clear plain English instructions whenever any button or slider is used.
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Removed as part of a central heating system replacement. Fully working.
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The Honeywell ST9100C Timer 7 Day is a programmable thermostat designed for central heating radiators. With 7-day programming and 3 on/off periods per day, this timer allows for flexible scheduling to maintain optimal heating settings. The white, wall-mounted device features a rectangular shape and is powered by a corded electric source. It is compatible with various systems and offers a timer feature for added convenience. As a product of the trusted brand Honeywell, this thermostat is a reliable and efficient choice for managing your home heating system.
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Included in side. CM921, CMS921, CMS921B1042. CM927, CMS927, CMS927B1049. CM727, CMS727, CMS727E1016. CM721, CMS721. However, the big difference is that the Pro Series Wireless Programmable Thermostat will bind directly to any existing Honeywell Wireless Relay Boxes, where the T3 Series won't, so you don't have the hassle of having to get an installer out to fit this.
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